Fair warning with ZFS: do not turn on deduplication at the moment.

There is a straight up data loss bug in 2.4.3 (zeroed out files, totally silent).

https://github.com/openzfs/zfs/issues/18366

This caused all sorts of grief at day job where dedupe was useful for a big cache. Conversely I've run ZFS at home for like 15 years at this point without trouble. But this one is an absolute nightmare.